Safety starting mechanism for motors.



i 4The object of thlsfinvention 'is' to provide.

i' vide meansfor starting amotor, Whichfmeans l pressure toinure'the operator.

'1'0 lavlldzvhomfit may concern."

. Beit known that I, ADoLPnUs H. BEECHER', l

a citizen of the United States o f America, yand-a resident of Mason City, Cerro Gordo county, Iowa, have invented va new and useful Safety Starting Mechanism for Motors, of which the followingisa'specification. l

improvedrneansvfor startinga motor. Q I further object 'of this invention' is -to pro- Will prevent the accidental application of back --A further o ject of thls `invention is to' vide means for vs'tartlng a vgasolene-eng1ne, 1n

, the use of which means the force generated' by back-iirin of. the engine will lnot -be applied to injuret e operator., f

i My invention consists in the ',construction, arrangement, and combination vof elements .hereinafter set forth, pointed out 1n my claims, and illustrated by the accompanying drawings, in4 Which- Figure' 1 isla side elevation of the complete' device. Fig. 2 is a 'cross-section of the d evice.

' right angles to Fig. .2.

the numeral 10'designates an' engine-shaft or- .3o-

' In the construction of the device 'asshown crank-'shaft of anv engine or motor, in this ins tance presumed to be driven. by anexploy slve-englne medium. -A casln 11 1s mount.-

movement` in one direction longitudinally of- 35 ed loosely on the shaft 10 and 1s held against said shaft by a collar 12. The casing 11 is formed'with a rim or circular flange 13 concentric'with and surrounding the shaft 10. The casing-11 is-,formed with a lug or ear 14,

' adaptedtoreceive a-bolt 15, 4mounted in a suitable support .16, such ask an engine-body, -and a coilsprir'ig `171is 1n'terpose between V said ear and support. The casing 11 has a which movement is .cushioned by t 17. t A crank 18v is'mountedloosely on the portion of the shaft v10, and the head of said ment-of said crank longitudinally of the shaft.

slight movement relative to the support 16,

shaft 10, and the hub of said crank extends within and concentric with the rim`13v of the l casing. A screw 19, is seatedin the outer end screw overlaps the crank 18 and limits Inove- The crank .18 andscre'w. 19\ also prevent movement of the casing 11 longitudinally of the shaft and away fromfthe' collar 12. A

pluralityI of tapering seats 20, in this instance.

three in number, are formed in the inner sursp'ieaticnj of Letters Patent.v Appii'omon nt@ cachan, 1904.. serai No. 229.873."

Aand vnormall of lthe ycrank tional manner.

Fig; 3 is a section View ofthe device at,

e spring 'PATE-N T- oFF-1on1 l oF" MAsoN'cirn IoWAQR i Patented March 13, 1906.

face of the crank and open to the shaft 10.

-Friction-rollers 21., in this instance three in nu1nber,.are mounted in the tapering seats 20 are pressed toward the narrower ends o said seats by springsf22, in this instance three innumber, also mountedpin said seats." It is the function ofthe' springs 22 to"press t'herollers A21 into. the `narrower portion of the slots 2Q 'and establish through said rollers a friction engagement` between the shaft. and crank 18.4 In the rotation 18 clockwise or tothe right (which will be tothe left as the parts are illus c tratedin Fig. 2) by manual fm@ applied to the handle thereof. the shaft 10fis rotated to the right through the medium of the rollers 21.

Such movement of the shaft 10 eifects a startf ing of the engine or motor in this instance by compressinga'charge of motive fluid in an explosionA-chamber and igniting fit in aconven-v the manual force of the o erator manipulatl u -It sometimes occurs that the; charge 1s ignited 1n such a manner and 'at such v. time as to throw the whole force of the ex#A lplosion against 4thecrank 18 .and against l8o` ing said crank to the en of causin serious damage and hurt to the operator.

o avoid such occurrences, I have providedia releasinglplate or disk 23, concentric with and sur- 23 loose y embraces'the'hub of the crank 18 and ixs provided with dogs-or-arms 24, in this instance three in number, 'which dogsor arms extend inward from points of attachment to the disk through notches in the rim ofthe disk and through notches -in said hub into the tapering seats and in front ofand outof contact with the rollers 2-1. The dogs or arms 24l may be arranged for adjustment Yon the disk 23 to compensate forwear'thereof in use. Tapering seats 25, tapered opposite to the seats 20, are formed in the periphery of the disk 23, and friction7ro1lers 26 are mounted in saidseats 25 and normally are pressed toward the narrower portion of said seats by s rings27. In turning. thecrank 18 and roo s aft 1 0 to theright the release plate or disk, v

carryingthe dogs- 24, also turns to the-right;v but when the engine back-iires and applies back ressure suddenly to the shaft and crank said s aft, crank, dogs, and release-plate are .moved'suddenly to the left, and such moves ment to the left causes the friction-rollers 26 -to `,engage or bitethe inner surface of the rim 13 of the casing and locks therelease-plate IIC.

against furthermovement in such dire'action,` f

roundinl the hub of the'crank 18. The disk 5 said dogs to release the The locking of the 4release-plate against mov'emerit'to the left stops the dogs 24 and causes frictional connection of the rollers 21 between the hub of the crank 18 and the shaft, thereby releasing said crank from the shaft. Having in mind that a very small movement of rotation of the release plate or disk 23 to the left will establish frictional engagement between said release-plate and the r1m 13 of the'casing 11 and also that a very small movement of the rollers 21 in the seats 20 will lrelease the connection through said rollers vbetween the crank and shaft, it is evident that the release of they crank from the shaft on the occasion of backring of the 'engine is practically Vinstantaneousand will not permit' such rearward movemen of the crank as would cause hurt or damage to the operator. A dust shield or guard 28 is' mounted around the hub of the crank 18 and is iaged to the rim 13' of the casing: 4 I claim as my invention- 1. A safety starting mechanism fonmotors, comprising a* casing loosely mounted on a shaft and spring held against rotation, a crank loosely mounted on said shaft, engagdevices between said crank and shaft and re easing devices connected with said casing and adapted to release said engaging devices.

2. A safety starting mechanism for motors,

said crank 'and shaft, a releasecomprising a shaft, a casing mointed on said shaft loosely, means for limiting rotation of said casing, a crank loosely mounted on said shaft, friction devices interposed between late, friction devices interposed between sai release-plate and the casing and release devices on sald release-plate and adapted lease the friction devices between the crank and shaft.

3. A safety starting mechanism for motors, comprising a shaft, a casing on said shaft, a rim on said casin means for limiting movement of .said casmg on said shaft, a crank loosely mounted on said shaft, sprin -pressed friction-rollers between and ada tecgi to connect said crank and shaft, a re ease plate loosely mountedl on said crank, sprin -pressed friction-rollers between and adapte to connect said release-plate and the rim of the casing, and arms on said release-plate adapted to enga e andrelease the friction-rollers between t e crank and'shaft.

Signed by me at Des Moines, Iowa, this 11th day of October,'1904.

' ADoLPHUs H. BEECHER.

i Witnesses:

S. C. SWEET, E. BRUNEMEIER.

to engage and re- 

